Fix node.js tests on Windows agents in Teamcity

node_utils.xml

@@ -44,9 +44,11 @@
 
         <move file="${dependencies}/${node.full.name}" tofile="${dependencies}/node"/>
         <delete dir="${dependencies}/${node.full.name}"/>
+        <delete file="${node.tar.gz}"/>
 
         <sequential if:set="isWindows">
             <get src="${url.node.exe}" dest="${node.exe}" usetimestamp="true"/>
+            <delete file="${node.executable}"/>
         </sequential>
     </target>
 
@@ -122,9 +124,8 @@
 
     <target name="run-nodejs-tests" description="Run JS backend tests in node.js" depends="download-nodejs-and-npm">
         <npm command="install" dir="js/js.translator/testData" />
-        <exec executable="node_modules/mocha/bin/mocha" dir="js/js.translator/testData" failonerror="true">
-            <arg value="--reporter"/>
-            <arg value="mocha-teamcity-reporter"/>
-        </exec>
+        <npm command="run" dir="js/js.translator/testData">
+            <arg value="test"/>
+        </npm>
     </target>
 </project>